4 USB TTL uarts on a USB hub - keeping them straight
Robert Moskowitz
rgm at htt-consult.com
Fri Aug 22 21:00:46 UTC 2014
I found out about the lsusb command.
It is reporting that they all have the same ID:
Bus 001 Device 034: ID 10c4:ea60 Cygnal Integrated Products, Inc. CP210x
UART Br
idge / myAVR mySmartUSB light
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 1.10
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0x10c4 Cygnal Integrated Products, Inc.
idProduct 0xea60 CP210x UART Bridge / myAVR mySmartUSB light
Though each has a different device number, but that is probably assigned
by the system as they attach.
On 08/22/2014 03:46 PM, Robert Moskowitz wrote:
> Well, if I had a hub with more ports, I would have more of these, as I
> have more systems to interface with the serial console....
>
> Anyway it seems that the dev assignment changes. They are
> /dev/ttyUSB[0-3] But at different times they are a different number
> which makes it hard to consistantly connect to the desired system.
>
> Is there someway to identify the units and assign them permenant
> device names. Much like is done with ethernet?
>
>
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